D-Day was the largest amphibious assault in history.
The Battle of Normandy, from June-August 1944, resulted in the Allied liberation of Western Europe from Nazi Germany. Called Operation Overlord, 156,000 American, British and Canadian forces landed on five beaches covering 50 miles of coastline heavily fortified by the Germans. The weather, and a large-scale deception campaign to mislead the Germans, aided their momentous invasion. Within one month of D-Day, all of northern France was liberated. By the following spring, the Allies defeated Nazi Germany.